1869. ] CLASSIFICATION OF THE HELICTERIN&. 649 
Genus 9. Newcompsia (Pfr.). 
T.. sinistrorsa, subimperforata, elongata, costata, plicata, aut sul- 
cata ; plica columellari nulla ; perist. simplici, subrecto. 
Newcombia cumingi (Newe.). Newcombia plicata (Migh.). 
cinnamomea (Pfr.). philippiana (Pfr.). 
newcombiana (Pfr.). —— suleata (Pfr.). 
Sec. 2. 
obscura (Newc.) = 
hutchinsonii (Pse.). 
“ meesta’’ (Newc.). 
The species of this genus are easily distinguished by their slender 
elongate shape and simple columella. 
I add, in Sec. 2, two species, similar in shape, but covered with a 
coarse epidermis, and furnished with a slight columellar fold; one is 
dextral. 
Genus 10. AuricuLELta (Pfr.). 
Auriculella, Pfeiff. Proc. Zool. Soc. 1855, p. 1; Mon. Hel. Viv. 
1859, vol. iv. p. 569. 
T. subperforata vel imperforata, oblongo-conica aut elongata ; 
pariete aperturali lamella spiraliter intrante munito; plica co- 
lumellari supera dentiformi vel obsoleta ; perist. expansiusculo. 
Auriculella auricula (Fér.)¥ Auriculella obeliscus (Pfr.). 
ambusta (Pse.).- pulehra (Pse.). - 
cerea (Pfr.). « —— petitiana (Pfr.). 
—— chamissoi (Pfr.). pumicata (Migh.). 
—— expansa (Pse.).— triplicata (Pse.). 
—— lurida (Pfr.). . uniplicata (Pse.). 
This genus is the most aberrant in form of the family. The spe- 
cies are smal] and distinguished by a lamina on the wall of the aper- 
ture, in addition to the usual columellar fold. The young have in 
some cases been mistaken for Tornatelline. 
Genus 11. Amastra (H. & A. Ad.). 
Amastra, Adams, Gen. Mollusca, 1858, vol. ii, p. 137. 
T. plerumque dextrorsa, epidermide munita ; plica columellari 
valida, le fore ; perist. intus incrassato, interdum sub- 
perforato. 3 
Amastra anthonii (Newe.). - Amustra reticulata (Newc.). 
Sarcimen (Ptfr.). similaris (Pse.). 
inflata (Ptr.). solida (Pse.). 
irregularis (Pfr.). spherica (Pse.). 
nigra (Newc.). —— tristis (Feér.). 
nucleola (Gld.). tewtilis (Fér.), 
— obesa, (Newe.). ventulus (ér.). 
—— porphyrostoma (Pse.). —— biplicata (Newe.) = 
—— rugulosa (Pse.). ““deshayesit”’ (Morelet). 
